Added back edds' hot/cold colouring
Added back edds' hot/cold colouring

milafrerichs/city-analytics-dashboard,codeforamerica/city-analytics-dashboard,CodeforHawaii/city-analytics-dashboard,milafrerichs/city-analytics-dashboard,codeforamerica/city-analytics-dashboard,codeforamerica/city-analytics-dashboard,milafrerichs/city-analytics-dashboard,openplans/city-analytics-dashboard,openplans/city-analytics-dashboard,CodeforHawaii/city-analytics-dashboard,CodeforHawaii/city-analytics-dashboard